Link calibration method, device and storage medium
By calibrating the intermediate frequency link of the millimeter wave active antenna unit AAU, the calibration compensation value is obtained, and the problem of cumbersome link calibration and low accuracy in the prior art is solved, and efficient and low-cost link calibration is achieved, which is suitable for large-scale deployment.
Patent Information
- Application Number
- CN202110997763.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-08-27
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2041-08-27
AI Technical Summary
In the prior art, the AAU link calibration process of millimeter wave active antenna unit is cumbersome and has low accuracy, which affects calibration efficiency and effect, and is costly and is not suitable for large-scale deployment.
By determining the intermediate frequency link, the intermediate frequency link is calibrated, the intermediate frequency reference signal is obtained, and the calibration compensation value is determined based on the intermediate frequency reference signal to calibrate the target link, improving calibration convenience, efficiency and accuracy, and reducing costs.
It effectively improves the convenience and accuracy of AAU link calibration of millimeter wave active antenna unit, reduces the construction cost of calibration system, and is suitable for large-scale deployment.
Smart Images
Figure CN115941073B_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of communication technology, and in particular to a link calibration method, device, and storage medium. Background Art
[0002] Fifth-generation (5G) millimeter-wave active antenna units (AAUs) utilize large-scale phased array technology. This technology involves phased array antennas that achieve beamforming by adjusting the amplitude and phase characteristics of each link. Amplitude and phase inconsistencies between AAU links can cause beam pointing deviation, increased sidelobe levels, and decreased equivalent radiated power, reducing communication quality. To address this technical issue and improve AAU communication quality, AAU links typically require calibration.
[0003] In related technologies, two methods, namely, receiving array calibration and transmitting array calibration, are usually used to implement millimeter wave active antenna unit (AAU) link calibration.
[0004] The existing method is that the calibration process of the millimeter wave active antenna unit (AAU) link is cumbersome and has low accuracy, which affects the calibration efficiency and calibration effect of the millimeter wave active antenna unit (AAU) link. Summary of the Invention
[0005] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.
[0006] To this end, the purpose of the present disclosure is to propose a link calibration method, device and storage medium, which can effectively improve the convenience of millimeter wave active antenna unit AAU link calibration, effectively improve the calibration efficiency of millimeter wave active antenna unit AAU link, effectively improve the calibration accuracy of millimeter wave active antenna unit AAU link, effectively reduce the construction cost of the millimeter wave active antenna unit AAU link calibration system, and is suitable for large-scale deployment of production lines.
[0007] The link calibration method proposed in the embodiment of the first aspect of the present disclosure is applied to the millimeter wave active antenna unit AAU, including: determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band, calibrating the intermediate frequency link to obtain an intermediate frequency reference signal, and obtaining a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band; determining a calibration compensation value corresponding to the calibration signal to be tested according to the intermediate frequency reference signal, and the calibration compensation value is used to calibrate the target link.
[0008] In some embodiments of the present disclosure, determining a calibration compensation value corresponding to a calibration signal to be measured based on an intermediate frequency reference signal includes:
[0009] Obtain the local oscillator signal provided by the millimeter wave active antenna unit AAU;
[0010] Down-converting the calibration test signal and the local oscillator signal to obtain the target test signal;
[0011] Determine the signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal;
[0012] According to the signal parameter value, a calibration compensation value is determined.
[0013] In some embodiments of the present disclosure, there are multiple intermediate frequency links, and calibration processing is performed on the intermediate frequency links to obtain an intermediate frequency reference signal, including:
[0014] Determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively;
[0015] An intermediate frequency reference signal is generated according to a plurality of reference compensation values.
[0016] In some embodiments of the present disclosure, generating an intermediate frequency reference signal according to multiple reference compensation values includes:
[0017] Calibrate the plurality of intermediate frequency links according to the plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links;
[0018] Acquire multiple target sequence signals respectively output by multiple calibrated intermediate frequency links;
[0019] An intermediate frequency reference signal is generated according to multiple target sequence signals.
[0020] In some embodiments of the present disclosure, generating an intermediate frequency reference signal according to multiple target sequence signals includes:
[0021] Multiple target sequence signals are coupled to obtain an intermediate frequency reference signal.
[0022] In some embodiments of the present disclosure, determining a plurality of reference compensation values corresponding to a plurality of intermediate frequency links respectively includes:
[0023] Determining an intermediate frequency reference link from a plurality of intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal;
[0024] Acquire a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated among multiple intermediate frequency links;
[0025] determining a signal parameter difference between the calibration sequence signal and the reference sequence signal;
[0026] Determine a reference compensation value corresponding to the current intermediate frequency link based on the signal parameter difference;
[0027] The current intermediate frequency link is updated to obtain a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively.
[0028] In some embodiments of the present disclosure, before obtaining the calibration sequence signal output by the current intermediate frequency link, the method further includes:
[0029] The current intermediate frequency link is turned on and other intermediate frequency links are turned off. The current intermediate frequency link and other intermediate frequency links together constitute multiple intermediate frequency links.
[0030] In some embodiments of the present disclosure, there are multiple target links. Before obtaining the calibration signal to be tested, the method further includes:
[0031] The current target link is turned on and other target links are turned off, wherein the current target link is the target link to be calibrated, and the current target link and other target links together constitute multiple target links.
[0032] The method proposed in the embodiment of the first aspect of the present disclosure determines an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band, calibrates the intermediate frequency link to obtain an intermediate frequency reference signal, and obtains a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band, and then determines a calibration compensation value corresponding to the calibration signal to be tested based on the intermediate frequency reference signal, and the calibration compensation value is used to calibrate the target link, which can effectively improve the convenience of millimeter wave active antenna unit AAU link calibration, effectively improve the calibration efficiency of the millimeter wave active antenna unit AAU link, effectively improve the calibration accuracy of the millimeter wave active antenna unit AAU link, effectively reduce the construction cost of the millimeter wave active antenna unit AAU link calibration system, and is suitable for large-scale deployment of production lines.
[0033] The link calibration device proposed in the embodiment of the second aspect of the present disclosure includes: a first determination unit, used to determine an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band; a calibration unit, used to calibrate the intermediate frequency link to obtain an intermediate frequency reference signal; an acquisition unit, used to acquire a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to a millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band; a second determination unit, used to determine a calibration compensation value corresponding to the calibration signal to be tested based on the intermediate frequency reference signal, and the calibration compensation value is used to calibrate the target link.
[0034] In some embodiments of the present disclosure, the second determining unit is specifically configured to:
[0035] Obtain the local oscillator signal provided by the millimeter wave active antenna unit AAU;
[0036] Down-converting the calibration test signal and the local oscillator signal to obtain the target test signal;
[0037] Determine the signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal;
[0038] According to the signal parameter value, a calibration compensation value is determined.
[0039] In some embodiments of the present disclosure, there are multiple intermediate frequency links, and the calibration unit is specifically configured to:
[0040] Determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively;
[0041] An intermediate frequency reference signal is generated according to a plurality of reference compensation values.
[0042] In some embodiments of the present disclosure, the calibration unit is further configured to:
[0043] Calibrate the plurality of intermediate frequency links according to the plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links;
[0044] Acquire multiple target sequence signals respectively output by multiple calibrated intermediate frequency links;
[0045] An intermediate frequency reference signal is generated according to multiple target sequence signals.
[0046] In some embodiments of the present disclosure, the calibration unit is further configured to:
[0047] Multiple target sequence signals are coupled to obtain an intermediate frequency reference signal.
[0048] In some embodiments of the present disclosure, the calibration unit is further configured to:
[0049] Determining an intermediate frequency reference link from a plurality of intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal;
[0050] Acquire a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated among multiple intermediate frequency links;
[0051] determining a signal parameter difference between the calibration sequence signal and the reference sequence signal;
[0052] Determine a reference compensation value corresponding to the current intermediate frequency link based on the signal parameter difference;
[0053] The current intermediate frequency link is updated to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links.
[0054] In some embodiments of the present disclosure, the calibration unit is further configured to:
[0055] Before obtaining the calibration sequence signal output by the current intermediate frequency link, the current intermediate frequency link is turned on and other intermediate frequency links are turned off, wherein the current intermediate frequency link and the other intermediate frequency links together constitute a plurality of intermediate frequency links.
[0056] In some embodiments of the present disclosure, the number of target links is multiple, and further includes:
[0057] The opening unit is used to open the current target link and close other target links before obtaining the calibration signal to be tested, wherein the current target link is the target link currently to be calibrated, and the current target link and other target links together constitute multiple target links.
[0058] The link calibration device proposed in the second aspect embodiment of the present disclosure determines an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band, calibrates the intermediate frequency link to obtain an intermediate frequency reference signal, and obtains a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, and the target link corresponds to a target frequency band, which is higher than the intermediate frequency band. Then, a calibration compensation value corresponding to the calibration signal to be tested is determined according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link, which can effectively improve the convenience of millimeter wave active antenna unit AAU link calibration, effectively improve the calibration efficiency of the millimeter wave active antenna unit AAU link, effectively improve the calibration accuracy of the millimeter wave active antenna unit AAU link, effectively reduce the construction cost of the millimeter wave active antenna unit AAU link calibration system, and is suitable for large-scale deployment of production lines.
[0059] The link calibration device proposed in the third embodiment of the present disclosure includes: a memory, a transceiver, and a processor: the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:
[0060] determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band;
[0061] Calibrate the intermediate frequency link to obtain an intermediate frequency reference signal;
[0062] Acquire a calibration test signal, wherein the calibration test signal is associated with a target link corresponding to a millimeter wave active antenna unit (AAU), the target link corresponds to a target frequency band, and the target frequency band is higher than an intermediate frequency band;
[0063] A calibration compensation value corresponding to the calibration signal to be measured is determined according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link.
[0064] In some embodiments of the present disclosure, the processor is specifically configured to:
[0065] Obtain the local oscillator signal provided by the millimeter wave active antenna unit AAU;
[0066] Down-converting the calibration test signal and the local oscillator signal to obtain the target test signal;
[0067] Determine the signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal;
[0068] According to the signal parameter value, a calibration compensation value is determined.
[0069] In some embodiments of the present disclosure, there are multiple intermediate frequency chains, and the processor is specifically configured to:
[0070] Determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively;
[0071] An intermediate frequency reference signal is generated according to a plurality of reference compensation values.
[0072] In some embodiments of the present disclosure, the processor is specifically configured to:
[0073] Calibrate the plurality of intermediate frequency links according to the plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links;
[0074] Acquire multiple target sequence signals respectively output by multiple calibrated intermediate frequency links;
[0075] An intermediate frequency reference signal is generated according to multiple target sequence signals.
[0076] In some embodiments of the present disclosure, the processor is specifically configured to:
[0077] Multiple target sequence signals are coupled to obtain an intermediate frequency reference signal.
[0078] In some embodiments of the present disclosure, the processor is specifically configured to:
[0079] Determining an intermediate frequency reference link from a plurality of intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal;
[0080] Acquire a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated among multiple intermediate frequency links;
[0081] determining a signal parameter difference between the calibration sequence signal and the reference sequence signal;
[0082] Determine a reference compensation value corresponding to the current intermediate frequency link based on the signal parameter difference;
[0083] The current intermediate frequency link is updated to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links.
[0084] In some embodiments of the present disclosure, the processor is specifically configured to:
[0085] Before obtaining the calibration sequence signal output by the current intermediate frequency link, the current intermediate frequency link is turned on and other intermediate frequency links are turned off, wherein the current intermediate frequency link and the other intermediate frequency links together constitute a plurality of intermediate frequency links.
[0086] In some embodiments of the present disclosure, the processor is specifically configured to:
[0087] Before obtaining the calibration signal to be tested, the current target link is turned on and other target links are turned off, wherein the current target link is the target link to be calibrated, and the current target link and the other target links together constitute a plurality of target links.
[0088] The processor-readable storage medium proposed in the fourth embodiment of the present disclosure stores a computer program, and the computer program is used to enable the processor to execute: the link calibration method proposed in the first embodiment of the present disclosure.
[0089] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0090] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:
[0091] Figure 1 is a flowchart of a link calibration method proposed in one embodiment of the present disclosure;
[0092] Figure 2 1 is a schematic structural diagram of a millimeter wave active antenna unit (AAU) link calibration system according to an embodiment of the present disclosure;
[0093] Figure 3a Schematic diagram of the X-axis step scanning mode of an embodiment of the present disclosure;
[0094] Figure 3b 2 is a schematic diagram of a Y-axis step scanning mode according to an embodiment of the present disclosure;
[0095] Figure 4 is a flowchart of a link calibration method proposed in another embodiment of the present disclosure;
[0096] Figure 5 is a flowchart of a link calibration method proposed in another embodiment of the present disclosure;
[0097] Figure 6 is a schematic diagram of intermediate frequency link calibration according to an embodiment of the present disclosure;
[0098] Figure 7 This is a schematic diagram of the structure of a link calibration device proposed in one embodiment of the present disclosure;
[0099] Figure 8 It is a structural diagram of a link calibration device proposed in another embodiment of the present disclosure. DETAILED DESCRIPTION
[0100] In the embodiments of the present disclosure, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.
[0101] In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.
[0102] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.
[0103] The technical solution provided by the embodiments of the present disclosure can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.
[0104] Figure 1 It is a flowchart of a link calibration method proposed in an embodiment of the present disclosure.
[0105] It should be noted that the executor of the link calibration method of this embodiment is a link calibration device, which can be implemented by software and / or hardware. The device can be integrated with the millimeter wave active antenna unit AAU to form a millimeter wave active antenna unit AAU link calibration system.
[0106] like Figure 1 As shown, the link calibration method includes:
[0107] S101: Determine an intermediate frequency link, where the intermediate frequency link corresponds to an intermediate frequency band.
[0108] like Figure 2 As shown, Figure 2This is a structural diagram of the millimeter wave active antenna unit AAU link calibration system in the embodiment of the present disclosure, including: a microwave darkroom, a probe, a scanning frame, a switch box, a frequency conversion module, a vector network analyzer, a millimeter wave active antenna unit AAU, a baseband processing unit (Base Band Unit, BBU), a network switch, a network cable, a radio frequency cable, an optical fiber, a 10M trigger line, wherein the trigger line refers to the Moving Average Convergence / Divergence (MACD) line, and a test personal computer (PC). The probe can be 8 dual-polarization probe antennas, and the number of channels of the switch box can be 2X16, which is not limited.
[0109] The link calibration method described in the embodiments of the present disclosure can be applied to Figure 2 In the millimeter wave active antenna unit AAU shown, calibration of each link in the millimeter wave active antenna unit AAU is achieved.
[0110] In the embodiment of the present disclosure, before calibrating each link of the millimeter wave active antenna unit AAU, the following can be done: Figure 2 The millimeter-wave active antenna unit AAU link calibration system shown is preprocessed. For example, a vector network analyzer can be set according to the frequency requirements for calibration of the millimeter-wave active antenna unit AAU, and a standard horn antenna can be used to align the probes of the microwave darkroom one by one. The amplitude and phase of the probe and the switch box are measured respectively, and the measured amplitude and phase values are saved.
[0111] Among them, in the millimeter wave active antenna unit AAU, the link can be an intermediate frequency link, a high frequency link, etc., and the number of intermediate frequency links can be one or more, and there is no restriction on this.
[0112] Among them, the medium frequency link corresponds to the medium frequency band (the medium frequency band is the frequency band corresponding to Sub-6G), and Sub-6G refers to the frequency below 6GHz.
[0113] That is to say, in this embodiment, determining the intermediate frequency link can be to determine the link with a frequency band corresponding to Sub-6G from multiple links in the millimeter wave active antenna unit AAU as the intermediate frequency link.
[0114] S102: Calibrate the intermediate frequency link to obtain an intermediate frequency reference signal.
[0115] After obtaining the intermediate frequency link, the intermediate frequency link can be calibrated to obtain a coupled signal of the signal output by the calibrated intermediate frequency link. This signal can be called an intermediate frequency reference signal. The intermediate frequency reference signal can be used as a reference signal for calibrating the high frequency link to assist in link calibration.
[0116] After the link calibration process for the intermediate frequency link is completed, a signal output by the intermediate frequency link after the calibration process can be obtained and used as an intermediate frequency reference signal.
[0117] S103: Acquire a calibration signal to be tested, where the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band.
[0118] In this embodiment, before obtaining the calibration signal to be tested, the current target link can be turned on and other target links can be turned off. This can effectively reduce the signal interference of other links on the current link during the process of obtaining the calibration signal to be tested, and effectively ensure the accuracy of the obtained calibration signal to be tested.
[0119] The current target link is the target link to be calibrated currently, and the current target link and other target links together constitute multiple target links.
[0120] Among them, the target link can correspond to a target frequency band, the target frequency band is higher than the intermediate frequency band, and the target link can output a calibration sequence signal, which can be called a calibration test signal. The calibration test signal can be used as a reference signal when calibrating the target link to achieve calibration of the target link.
[0121] That is to say, in the embodiment of the present disclosure, a high-frequency link with a frequency band higher than the intermediate frequency band can be set as the target link, and the calibration signal to be tested emitted by the high-frequency link can be obtained and combined with the intermediate frequency reference signal obtained above to achieve calibration of the high-frequency link.
[0122] In some embodiments, obtaining the calibration signal to be tested may be performed by adjusting the layout of the millimeter wave active antenna unit AAU antenna array. Figure 2 The distance between the probes in the microwave dark box in the millimeter wave active antenna unit AAU link calibration system shown in the figure, and the mode of adjusting the scanning frame is the X-axis step mode or the Y-axis step mode, as shown in FIG. Figure 3a 、 Figure 3b As shown, Figure 3a Schematic diagram of the X-axis step scanning mode of the embodiment of the present disclosure. Figure 3b This is a schematic diagram of the Y-axis step scanning mode of an embodiment of the present disclosure. After determining the scanning mode, the scanning frame movement can be controlled according to the selected scanning mode to align the probe with the antenna array element of the millimeter-wave active antenna unit AAU, and the high-frequency link corresponding to the millimeter-wave AAU is opened through the PC. The probe receives the signal sent by the high-frequency link and uses it as a calibration signal to be tested. There is no restriction on this.
[0123] S104: Determine a calibration compensation value corresponding to the calibration signal according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link.
[0124] After obtaining the calibration test signal, a calibration compensation value corresponding to the calibration test signal can be determined according to the intermediate frequency reference signal obtained above. The calibration compensation value can be used to perform calibration compensation on the target link to achieve calibration of the target link.
[0125] In some embodiments, the calibration compensation value corresponding to the calibration signal is determined based on the intermediate frequency reference signal. The signal parameters corresponding to the calibration signal to be measured and the signal parameters corresponding to the intermediate frequency reference signal can be subjected to difference processing to obtain the signal parameter difference, and the aforementioned signal parameter difference is used as the calibration compensation value. There is no limitation on this.
[0126] For example, the signal amplitude value and phase value of the intermediate frequency reference signal can be determined separately, and the signal amplitude value and phase value of the calibration signal to be tested can be determined separately, and then the amplitude difference between the calibration signal to be tested and the intermediate frequency reference signal, and the phase difference between the calibration signal to be tested and the intermediate frequency reference signal can be determined separately, and the aforementioned amplitude difference and phase difference can be used together as the calibration compensation value corresponding to the calibration signal to be tested, without any restriction.
[0127] The explanation of calibrating the target link according to the calibration compensation value can be specifically referred to the explanation of the following embodiment, which will not be repeated here.
[0128] In this embodiment, an intermediate frequency link is determined, wherein the intermediate frequency link corresponds to an intermediate frequency band, and the intermediate frequency link is calibrated to obtain an intermediate frequency reference signal, and a calibration signal to be tested is obtained, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, and the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band. Then, a calibration compensation value corresponding to the calibration signal to be tested is determined according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link, which can effectively improve the convenience of millimeter wave active antenna unit AAU link calibration, effectively improve the calibration efficiency of the millimeter wave active antenna unit AAU link, effectively improve the calibration accuracy of the millimeter wave active antenna unit AAU link, effectively reduce the construction cost of the millimeter wave active antenna unit AAU link calibration system, and is suitable for large-scale deployment of production lines.
[0129] Figure 4 It is a flowchart of a link calibration method proposed in another embodiment of the present disclosure.
[0130] like Figure 4 As shown, the link calibration method includes:
[0131] S401: Determine an intermediate frequency link, where the intermediate frequency link corresponds to an intermediate frequency band.
[0132] The description of S401 can be found in the above embodiment and will not be repeated here.
[0133] S402: Determine a plurality of reference compensation values corresponding to a plurality of intermediate frequency links respectively.
[0134] After the intermediate frequency link is determined, multiple reference compensation values corresponding to the multiple intermediate frequency links may be determined.
[0135] The reference value used to compensate each intermediate frequency link may be referred to as a reference compensation value.
[0136] In some embodiments, determining the reference compensation values corresponding to multiple intermediate frequency links respectively may be to determine multiple signal parameter values corresponding to the multiple intermediate frequency links respectively, and then determine multiple reference compensation values corresponding to the multiple intermediate frequency links respectively in combination with the multiple signal parameter values corresponding to the multiple intermediate frequency links. There is no limitation on this.
[0137] S403: Generate an intermediate frequency reference signal according to the multiple reference compensation values.
[0138] After the above-mentioned multiple reference compensation values corresponding to the multiple intermediate frequency links are respectively obtained, link compensation can be performed according to the multiple reference compensation values to generate an intermediate frequency reference signal. Since the intermediate frequency reference signal is generated according to the multiple reference compensation values corresponding to the intermediate frequency link, the applicability of the intermediate frequency reference signal generation method can be effectively improved while effectively ensuring the generation effect of the intermediate frequency reference signal. When the reference intermediate frequency reference signal is used to assist in calibrating the target link, the reference value of the reference intermediate frequency signal can be effectively improved, thereby greatly improving the calibration effect for the target link.
[0139] S404: Acquire a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band.
[0140] The description of S404 can be found in the above embodiment and will not be repeated here.
[0141] S405: Obtain a local oscillator signal provided by the millimeter wave active antenna unit AAU.
[0142] When obtaining the calibration test signal output by the high frequency link of the millimeter wave active antenna unit AAU, the local oscillator signal provided by the millimeter wave active antenna unit AAU can also be obtained.
[0143] S406: Perform down-conversion processing on the calibration signal to be measured and the local oscillator signal to obtain a target signal to be measured.
[0144] After obtaining the local oscillator signal and the calibration test signal provided by the millimeter wave active antenna unit AAU, the calibration test signal and the local oscillator signal can be down-converted to obtain a down-converted signal, which can be called the target test signal.
[0145] In this embodiment, the calibration signal to be measured and the local oscillator signal can be input as follows Figure 2 In the frequency conversion module shown, the frequency conversion module down-converts the calibration test signal and the local oscillator signal, that is, moves the target frequency band corresponding to the calibration test signal to the intermediate frequency band to obtain the target test signal with the intermediate frequency band.
[0146] S407: Determine a signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal.
[0147] After down-converting the calibration test signal and the local oscillator signal to obtain the target test signal, the signal parameter value corresponding to the target test signal can be determined based on the intermediate frequency reference signal. The signal parameter value can be used to describe the signal parameters corresponding to the target test signal. The signal parameters can be, for example, signal amplitude, signal phase, etc., and there is no limitation on this.
[0148] In this embodiment, the signal parameter value corresponding to the target signal to be measured is determined according to the intermediate frequency reference signal, which can be input into the target signal to be measured. Figure 2 In Port 2 of the vector network analyzer shown in the figure, the vector network analyzer is connected to the intermediate frequency reference signal and the calibration signal to be measured, as well as the 10M synchronization signal provided by the BBU. At this time, the scanning frame can be controlled to scan and measure different elements of the millimeter wave AAU antenna array one by one to obtain the amplitude data and phase data of the high-frequency link corresponding to the different elements of the millimeter wave AAU antenna array. After obtaining the amplitude data and phase data of the high-frequency link, the amplitude data and phase data of the high-frequency link can be subtracted from the amplitude data and phase data of the probe and switch box saved in the preprocessing process to obtain the actual amplitude data and phase data of the high-frequency link, and use them as the signal parameter values corresponding to the target signal to be measured.
[0149] S408: Determine a calibration compensation value according to the signal parameter value.
[0150] After determining the signal parameter value corresponding to the target signal to be measured based on the intermediate frequency reference signal, the calibration compensation value can be determined based on the signal parameter value.
[0151] In some embodiments, the calibration compensation value is determined based on the signal parameter value. The amplitude value and phase value of the target signal to be measured output by the target link q can be subtracted from the amplitude value and phase value of the signal output by the other link T to obtain the corresponding amplitude difference and signal difference, and the amplitude difference and phase difference are used as the calibration compensation value. The specific calculation method is as follows:
[0152] ΔI=I T –I q
[0153]
[0154] Where ΔI is the amplitude difference, is the phase difference value.
[0155] After calculating the corresponding amplitude difference and phase difference according to the signal parameter value and using them as calibration compensation values, the target link can be calibrated and compensated according to the calibration compensation values. For example, the amplitude and phase calibration factors can be used according to the calibration compensation values. The target link is compensated to achieve calibration of the target link.
[0156] Therefore, in this embodiment, the local oscillator signal provided by the millimeter wave active antenna unit AAU is obtained, and the calibration test signal and the local oscillator signal are down-converted to obtain the target test signal, and then the signal parameter value corresponding to the target test signal is determined according to the intermediate frequency reference signal, and the calibration compensation value is determined according to the signal parameter value. This can effectively solve the technical problem that the local oscillator signal introduces a random phase, which leads to the inability to effectively obtain the compensation value, and effectively ensure the accuracy of the calibration compensation value, so that the link calibration effect can be effectively improved based on the calibration compensation value.
[0157] In this embodiment, after determining the intermediate frequency link and multiple reference compensation values corresponding to the multiple intermediate frequency links, an intermediate frequency reference signal can be generated according to the multiple reference compensation values. Since the intermediate frequency reference signal is generated according to the multiple reference compensation values corresponding to the intermediate frequency link, the applicability of the intermediate frequency reference signal generation method can be effectively improved while effectively ensuring the generation effect of the intermediate frequency reference signal. When the reference intermediate frequency reference signal assists in calibrating the target link, the reference value of the reference intermediate frequency signal can be effectively improved, thereby greatly improving the calibration effect for the target link, and then obtaining the calibration signal to be tested, wherein the calibration signal to be tested is consistent with the millimeter wave active The antenna unit AAU is associated with the target link corresponding to the target link, and the target link corresponds to the target frequency band, which is higher than the intermediate frequency band. The local oscillator signal provided by the millimeter wave active antenna unit AAU is obtained, and the calibration test signal and the local oscillator signal are down-converted to obtain the target test signal. Then, according to the intermediate frequency reference signal, the signal parameter value corresponding to the target test signal is determined, and the calibration compensation value is determined according to the signal parameter value. This can effectively solve the technical problem that the local oscillator signal introduces a random phase, which leads to the inability to be effectively compensated, and effectively ensure the accuracy of the calibration compensation value, so that the link calibration effect can be effectively improved based on the calibration compensation value.
[0158] Figure 5 It is a flowchart of a link calibration method proposed in another embodiment of the present disclosure.
[0159] like Figure 5 As shown, the link calibration method includes:
[0160] S501: Determine an intermediate frequency link, where the intermediate frequency link corresponds to an intermediate frequency band.
[0161] The description of S501 can be found in the above embodiment and will not be repeated here.
[0162] S502: Determine an intermediate frequency reference link from multiple intermediate frequency links, where the intermediate frequency reference link corresponds to a reference sequence signal.
[0163] Among them, the intermediate frequency link used for calibration reference of the intermediate frequency link can be called an intermediate frequency reference link, and the intermediate frequency reference link belongs to multiple intermediate frequency links.
[0164] After determining the multiple IF links, an IF reference link may be determined from the multiple IF links. The IF reference link may have a corresponding signal, which may be called a reference sequence signal.
[0165] In some embodiments, one or more intermediate frequency links may be randomly selected from multiple intermediate frequency links and used as intermediate frequency reference links, without limitation.
[0166] S503: Enable the current intermediate frequency link and disable other intermediate frequency links, wherein the current intermediate frequency link and other intermediate frequency links together constitute multiple intermediate frequency links.
[0167] Among them, the intermediate frequency link currently to be calibrated can be called the current intermediate frequency link. Correspondingly, among multiple intermediate frequency links, the intermediate frequency lines other than the current intermediate frequency link can be called other intermediate frequency links. The other intermediate frequency links can together with the current intermediate frequency link constitute multiple intermediate frequency links.
[0168] In this embodiment, in order to obtain the signal output by the current intermediate frequency link, the current intermediate frequency link can be turned on and other intermediate frequency links can be turned off. In this way, during the signal acquisition process, the interference of other intermediate frequency links on the current intermediate frequency link can be minimized, thereby effectively ensuring the effect of signal acquisition.
[0169] S504: Acquire a calibration sequence signal output by a current intermediate frequency link, where the current intermediate frequency link is an intermediate frequency link to be calibrated among multiple intermediate frequency links.
[0170] After the current intermediate frequency link is turned on and other intermediate frequency links are turned off, the signal output by the current intermediate frequency link can be obtained, and this signal can be called a calibration sequence signal.
[0171] In this embodiment, obtaining the calibration sequence signal output by the current intermediate frequency link can be achieved by opening any intermediate frequency link in the current intermediate frequency link and closing other intermediate frequency links in the current intermediate frequency link to obtain the calibration sequence signal output by the intermediate frequency link. According to this method, all intermediate frequency links in the current intermediate frequency link are opened in turn to obtain multiple calibration sequence signals output by the current intermediate frequency link.
[0172] S505: Determine a signal parameter difference between the calibration sequence signal and the reference sequence signal.
[0173] After obtaining the calibration sequence signal output by the current intermediate frequency link, the signal parameter values corresponding to the calibration sequence signal and the reference sequence signal can be determined. The signal parameter values can be specifically, for example, signal amplitude values, signal phase values, etc., which are not limited.
[0174] For example, the calibration sequence signal obtained above can be input into Figure 6 As shown ( Figure 6 In the coupling network of the intermediate frequency link calibration diagram of the embodiment of the present disclosure, each port of the coupling network has the same attenuation and phase shift. The calibration sequence signal is coupled to the calibration channel through the coupling network. During this process, the corresponding signal amplitude value and signal phase value are recorded, and the recorded signal amplitude value and signal phase value are used as the signal parameter values corresponding to the calibration sequence signal and the reference sequence signal.
[0175] Furthermore, after determining the signal parameter values corresponding to the calibration sequence signal and the reference sequence signal, respectively, a signal parameter difference between the calibration sequence signal and the reference sequence signal can be determined based on the signal parameter values. The signal parameter difference can specifically be, for example, a signal amplitude difference or a phase difference between the calibration sequence signal and the reference sequence signal, without limitation.
[0176] In this embodiment, the specific calculation method for determining the signal parameter difference between the calibration sequence signal and the reference sequence signal is:
[0177] ΔI m =I Tm –I p
[0178]
[0179] Among them, ΔI m It can be used to represent the amplitude difference between the calibration sequence signal and the reference sequence signal. It can be used to represent the phase difference between the calibration sequence signal and the reference sequence signal, P represents the reference sequence signal, and Tm represents the calibration sequence signal.
[0180] S506: Determine a reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference.
[0181] After determining the amplitude difference and phase difference between the calibration sequence signal and the reference sequence signal, a reference compensation value corresponding to the current intermediate frequency link can be determined according to the signal parameter difference.
[0182] In this embodiment, a reference compensation value corresponding to the current intermediate frequency link can be calculated based on the signal parameter difference. The specific calculation method is as follows:
[0183]
[0184] Among them, C p Indicates the reference compensation value corresponding to the current IF link.
[0185] S507: Update the current intermediate frequency link to obtain a plurality of reference compensation values corresponding to the plurality of intermediate frequency links.
[0186] In this embodiment, an intermediate frequency reference link is determined from multiple intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal, and a calibration sequence signal output by the current intermediate frequency link is obtained, wherein the current intermediate frequency link is the intermediate frequency link to be calibrated among the multiple intermediate frequency links, and the current intermediate frequency link belongs to multiple intermediate frequency links, and then a signal parameter difference between the calibration sequence signal and the reference sequence signal is determined, and based on the signal parameter difference, a reference compensation value corresponding to the current intermediate frequency link is determined, and the current intermediate frequency link is updated to obtain multiple reference compensation values corresponding to the multiple intermediate frequency links, thereby effectively improving the flexibility of the reference compensation value determination method, effectively improving the practicality of the reference compensation value determination method, and ensuring the accuracy of the reference compensation value to a large extent.
[0187] S508: Calibrate the plurality of intermediate frequency links according to the plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links.
[0188] After determining the reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference, multiple intermediate frequency links can be calibrated according to the multiple reference compensation values to obtain multiple calibrated intermediate frequency links.
[0189] That is, after determining the reference compensation value corresponding to the current IF link, amplitude compensation and phase compensation can be performed on the IF link according to the reference compensation value to calibrate the IF link and obtain multiple calibrated IF links.
[0190] S509: Acquire multiple target sequence signals respectively output by multiple calibrated intermediate frequency links.
[0191] After completing the calibration of the intermediate frequency link and obtaining multiple calibrated intermediate frequency links, multiple signals output by the multiple calibrated intermediate frequency links can be obtained. The signals can be called target sequence signals.
[0192] S510: Generate an intermediate frequency reference signal according to multiple target sequence signals.
[0193] After obtaining the multiple target sequence signals respectively output by the multiple calibrated intermediate frequency links, an intermediate frequency reference signal can be generated according to the multiple target sequence signals.
[0194] Optionally, in some embodiments, an intermediate frequency reference signal is generated based on multiple target sequence signals, and the multiple target sequence signals can be coupled to obtain the intermediate frequency reference signal. Since the multiple target sequence signals are coupled to obtain the intermediate frequency reference signal, the accuracy of the intermediate frequency reference signal can be effectively guaranteed, thereby effectively assisting in improving the link calibration accuracy based on the intermediate frequency reference signal.
[0195] For example, multiple target sequence signals outputted by multiple calibrated intermediate frequency links can be input into Figure 6 In the coupling network shown, after coupling multiple target sequence signals, the coupling network can output the corresponding IF signal through the Test Output port. At the same time, this IF signal can be input into Port 1 of the vector network analyzer to assist in calibrating the target link. This IF signal can be called an IF reference signal.
[0196] S511: Acquire a calibration signal to be tested, where the calibration signal to be tested is associated with a target link corresponding to a millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than an intermediate frequency band.
[0197] S512: Determine a calibration compensation value corresponding to the calibration signal according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link.
[0198] The description of S511 - S512 can be found in the above embodiment and will not be repeated here.
[0199] In this embodiment, by determining the intermediate frequency link, determining the intermediate frequency reference link from multiple intermediate frequency links, then turning on the current intermediate frequency link and turning off other intermediate frequency links, by determining the intermediate frequency reference link from multiple intermediate frequency links, the intermediate frequency reference link corresponds to a reference sequence signal, and obtaining the calibration sequence signal output by the current intermediate frequency link, and then determining the signal parameter difference between the calibration sequence signal and the reference sequence signal, and determining the reference compensation value corresponding to the current intermediate frequency link based on the signal parameter difference, thereby effectively improving the flexibility of the reference compensation value determination method, effectively improving the practicality of the reference compensation value determination method, and being able to largely guarantee the accuracy of the reference compensation value. Then, the multiple intermediate frequency links are calibrated according to the multiple reference compensation values to obtain multiple calibrated intermediate frequency links, and multiple target sequence signals respectively output by the multiple calibrated intermediate frequency links are obtained. According to the multiple target sequence signals, an intermediate frequency reference signal is generated, and then the calibration signal to be tested is obtained. The calibration compensation value corresponding to the calibration signal to be tested is determined according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link, which can effectively improve the convenience of the millimeter wave active antenna unit AAU link calibration, effectively improve the calibration efficiency of the millimeter wave active antenna unit AAU link, and effectively improve the calibration accuracy of the millimeter wave active antenna unit AAU link.
[0200] In summary, the embodiments of the present disclosure provide a 5G millimeter wave antenna unit (AAU) link calibration method that can effectively improve the beamforming capability of the 5G millimeter wave antenna unit (AAU). Compared with existing link calibration methods, it has the following advantages:
[0201] (1) The present invention adopts a method that combines point-to-point alignment and internal and external (air interface) calibration to calibrate the entire link of the 5G millimeter wave antenna unit AAU, which can effectively reduce the calibration error introduced by the edge effect of the antenna array surface. Compared with the existing technology, it has the advantages of long calibration link and high calibration accuracy.
[0202] (2) The present invention adopts the method of transmitting a calibration sequence signal to perform amplitude and phase calibration of the 5G millimeter wave antenna unit AAU link. Compared with the cumbersome process of the rotation vector method, the present invention has the advantages of being convenient, fast, time-saving and efficient, and is more suitable for large-scale deployment on production lines.
[0203] (3) The present invention adopts a down-conversion method to convert the amplitude and phase calibration problems of the 5G millimeter wave antenna unit AAU to the intermediate frequency (Sub-6G) band, which can greatly reduce the system construction cost and is more suitable for large-scale deployment of low-cost production lines, solving industry problems.
[0204] Figure 7 It is a schematic diagram of the structure of a link calibration device proposed in one embodiment of the present disclosure.
[0205] like Figure 7 As shown, the link calibration device 70 includes:
[0206] The first determining unit 701 is configured to determine an intermediate frequency link, where the intermediate frequency link corresponds to an intermediate frequency band;
[0207] The calibration unit 702 is configured to perform calibration processing on the intermediate frequency link to obtain an intermediate frequency reference signal;
[0208] An acquisition unit 703 is configured to acquire a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band;
[0209] The second determining unit 704 is configured to determine a calibration compensation value corresponding to the calibration signal according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link.
[0210] In some embodiments of the present disclosure, the second determining unit 704 is specifically configured to:
[0211] Obtain the local oscillator signal provided by the millimeter wave active antenna unit AAU;
[0212] Down-converting the calibration test signal and the local oscillator signal to obtain the target test signal;
[0213] Determine the signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal;
[0214] According to the signal parameter value, a calibration compensation value is determined.
[0215] In some embodiments of the present disclosure, there are multiple intermediate frequency links, and the calibration unit 702 is specifically configured to:
[0216] Determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively;
[0217] An intermediate frequency reference signal is generated according to a plurality of reference compensation values.
[0218] In some embodiments of the present disclosure, the calibration unit 702 is further configured to:
[0219] Calibrate the plurality of intermediate frequency links according to the plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links;
[0220] Acquire multiple target sequence signals respectively output by multiple calibrated intermediate frequency links;
[0221] An intermediate frequency reference signal is generated according to multiple target sequence signals.
[0222] In some embodiments of the present disclosure, the calibration unit 702 is further configured to:
[0223] Multiple target sequence signals are coupled to obtain an intermediate frequency reference signal.
[0224] In some embodiments of the present disclosure, the calibration unit 702 is further configured to:
[0225] Determining an intermediate frequency reference link from a plurality of intermediate frequency links, where the intermediate frequency reference link corresponds to a reference sequence signal;
[0226] Acquire a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated among multiple intermediate frequency links;
[0227] determining a signal parameter difference between the calibration sequence signal and the reference sequence signal;
[0228] Determine a reference compensation value corresponding to the current intermediate frequency link based on the signal parameter difference;
[0229] The current intermediate frequency link is updated to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links.
[0230] In some embodiments of the present disclosure, the calibration unit 702 is further configured to:
[0231] Before obtaining the calibration sequence signal output by the current intermediate frequency link, the current intermediate frequency link is turned on and other intermediate frequency links are turned off, wherein the current intermediate frequency link and the other intermediate frequency links together constitute a plurality of intermediate frequency links.
[0232] In some embodiments of the present disclosure, the number of target links is multiple, and the link calibration device 70 further includes:
[0233] The opening unit 705 is used to open the current target link and close other target links before obtaining the calibration signal to be tested, wherein the current target link is the target link currently to be calibrated, and the current target link and other target links together constitute multiple target links.
[0234] It should be noted here that the above-mentioned device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.
[0235] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.
[0236] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium.
[0237] Based on this understanding, the technical solution of the present disclosure, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present disclosure. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.
[0238] In this embodiment, an intermediate frequency link is determined, wherein the intermediate frequency link corresponds to an intermediate frequency band, and the intermediate frequency link is calibrated to obtain an intermediate frequency reference signal, and a calibration signal to be tested is obtained, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, and the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band. Then, a calibration compensation value corresponding to the calibration signal to be tested is determined according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link, which can effectively improve the convenience of millimeter wave active antenna unit AAU link calibration, effectively improve the calibration efficiency of the millimeter wave active antenna unit AAU link, effectively improve the calibration accuracy of the millimeter wave active antenna unit AAU link, effectively reduce the construction cost of the millimeter wave active antenna unit AAU link calibration system, and is suitable for large-scale deployment of production lines.
[0239] Figure 8 It is a structural diagram of a link calibration device proposed in another embodiment of the present disclosure.
[0240] See also Figure 8 The link calibration device 80 includes a memory 801, a transceiver 802, a processor 803, and a user interface 804. The memory 801 is used to store a computer program; the transceiver 802 is used to send and receive data under the control of the processor 803; the processor 803 is used to read the computer program in the memory 801 and perform the following operations:
[0241] Determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band;
[0242] Performing calibration processing on the intermediate frequency link to obtain an intermediate frequency reference signal;
[0243] Acquire a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band;
[0244] A calibration compensation value corresponding to the calibration signal to be measured is determined according to the intermediate frequency reference signal, wherein the calibration compensation value is used to calibrate the target link.
[0245] Among them, Figure 8In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 803 and memory represented by memory 801. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 802 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. For different user devices, the user interface 804 may also be an interface capable of connecting external or internal devices as required, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
[0246] The processor 803 is responsible for managing the bus architecture and general processing, and the memory 801 can store data used by the processor 800 when performing operations.
[0247] Optionally, the processor 803 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.
[0248] The processor calls the computer program stored in the memory to execute any method provided by the embodiment of the present disclosure according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.
[0249] In some embodiments of the present disclosure, the processor 803 is specifically configured to:
[0250] Acquire a local oscillator signal provided by the millimeter wave active antenna unit AAU;
[0251] Performing down-conversion processing on the calibration test signal and the local oscillator signal to obtain a target test signal;
[0252] Determining a signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal;
[0253] The calibration compensation value is determined according to the signal parameter value.
[0254] In some embodiments of the present disclosure, there are multiple intermediate frequency links, and the processor 803 is specifically configured to:
[0255] Determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively;
[0256] The intermediate frequency reference signal is generated according to the multiple reference compensation values.
[0257] In some embodiments of the present disclosure, the processor 803 is specifically configured to:
[0258] Performing calibration processing on the multiple intermediate frequency links respectively according to the multiple reference compensation values to obtain multiple calibrated intermediate frequency links;
[0259] Acquire multiple target sequence signals respectively output by the multiple calibrated intermediate frequency links;
[0260] The intermediate frequency reference signal is generated according to the multiple target sequence signals.
[0261] In some embodiments of the present disclosure, the processor 803 is specifically configured to:
[0262] The multiple target sequence signals are coupled to obtain the intermediate frequency reference signal.
[0263] In some embodiments of the present disclosure, the processor 803 is specifically configured to:
[0264] Determine an intermediate frequency reference link from the multiple intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal;
[0265] Acquire a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link currently to be calibrated among the multiple intermediate frequency links;
[0266] determining a signal parameter difference between the calibration sequence signal and the reference sequence signal;
[0267] Determining a reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference;
[0268] The current intermediate frequency link is updated to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links.
[0269] In some embodiments of the present disclosure, the processor 803 is specifically configured to:
[0270] Before obtaining the calibration sequence signal output by the current intermediate frequency link, the current intermediate frequency link is turned on and other intermediate frequency links are turned off, wherein the current intermediate frequency link and the other intermediate frequency links together constitute the multiple intermediate frequency links.
[0271] In some embodiments of the present disclosure, the processor 803 is specifically configured to:
[0272] Before obtaining the calibration signal to be tested, the current target link is opened and other target links are closed, wherein the current target link is the target link to be calibrated currently, and the current target link and the other target links together constitute a plurality of target links.
[0273] To implement the above embodiment, an embodiment of the present disclosure proposes a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute a link calibration method.
[0274] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.
[0275] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0276] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce an article of manufacture comprising an instruction device that implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.
[0277] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.
[0278] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.
[0279] It should be noted that, in the description of this disclosure, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of this disclosure, unless otherwise specified, the meaning of "plurality" is two or more.
[0280] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.
[0281] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.
[0282] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.
[0283] In addition, the functional units in the various embodiments of the present disclosure may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.
[0284] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.
[0285] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0286] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.
Claims
1. A link calibration method, characterized in that: Applied to a millimeter wave active antenna unit (AAU), the method includes: Determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band; Performing calibration processing on the intermediate frequency link to obtain an intermediate frequency reference signal; Acquire a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band; Acquire a local oscillator signal provided by the millimeter wave active antenna unit AAU; Performing down-conversion processing on the calibration test signal and the local oscillator signal to obtain a target test signal; Determining a signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal; A calibration compensation value corresponding to the calibration signal to be measured is determined according to the signal parameter value, wherein the calibration compensation value is used to calibrate the target link.
2. The method according to claim 1, wherein There are multiple intermediate frequency links, and calibrating the intermediate frequency links to obtain intermediate frequency reference signals includes: Determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively; The intermediate frequency reference signal is generated according to the multiple reference compensation values.
3. The method according to claim 2, wherein Generating the intermediate frequency reference signal according to the multiple reference compensation values includes: Performing calibration processing on the multiple intermediate frequency links respectively according to the multiple reference compensation values to obtain multiple calibrated intermediate frequency links; Acquire multiple target sequence signals respectively output by the multiple calibrated intermediate frequency links; The intermediate frequency reference signal is generated according to the multiple target sequence signals.
4. The method according to claim 3, wherein Generating the intermediate frequency reference signal according to the multiple target sequence signals includes: The multiple target sequence signals are coupled to obtain the intermediate frequency reference signal.
5. The method according to claim 2, wherein The determining of a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively includes: Determine an intermediate frequency reference link from the multiple intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal; Acquire a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link currently to be calibrated among the multiple intermediate frequency links; determining a signal parameter difference between the calibration sequence signal and the reference sequence signal; Determining a reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference; The current intermediate frequency link is updated to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links.
6. The method according to claim 5, wherein Before obtaining the calibration sequence signal output by the current intermediate frequency link, the method further includes: The current intermediate frequency link is turned on, and other intermediate frequency links are turned off, wherein the current intermediate frequency link and the other intermediate frequency links together constitute the multiple intermediate frequency links.
7. The method according to claim 1, wherein The number of the target links is multiple, and before obtaining the calibration signal to be tested, the method further includes: The current target link is turned on and the other target links are turned off, wherein the current target link is the target link to be calibrated currently, and the current target link and the other target links together constitute a plurality of target links.
8. A link calibration device, characterized in that: Applied to a millimeter wave active antenna unit (AAU), the device comprises: A first determining unit is configured to determine an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band; a calibration unit, configured to perform calibration processing on the intermediate frequency link to obtain an intermediate frequency reference signal; an acquiring unit, configured to acquire a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band; The second determination unit is used to obtain the local oscillator signal provided by the millimeter wave active antenna unit AAU; down-convert the calibration test signal and the local oscillator signal to obtain the target test signal; determine the signal parameter value corresponding to the target test signal according to the intermediate frequency reference signal; determine the calibration compensation value corresponding to the calibration test signal according to the signal parameter value, wherein the calibration compensation value is used to calibrate the target link.
9. The device according to claim 8, wherein There are multiple intermediate frequency links, and the calibration unit is specifically used to: Determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links respectively; The intermediate frequency reference signal is generated according to the multiple reference compensation values.
10. The device according to claim 9, wherein The calibration unit is further used for: Performing calibration processing on the multiple intermediate frequency links respectively according to the multiple reference compensation values to obtain multiple calibrated intermediate frequency links; Acquire multiple target sequence signals respectively output by the multiple calibrated intermediate frequency links; The intermediate frequency reference signal is generated according to the multiple target sequence signals.
11. The device according to claim 10, wherein The calibration unit is further used for: The multiple target sequence signals are coupled to obtain the intermediate frequency reference signal.
12. The device according to claim 9, wherein The calibration unit is further used for: Determine an intermediate frequency reference link from the multiple intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal; Acquire a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link currently to be calibrated among the multiple intermediate frequency links; determining a signal parameter difference between the calibration sequence signal and the reference sequence signal; Determining a reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference; The current intermediate frequency link is updated to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links.
13. The device according to claim 12, wherein The calibration unit is further used for: Before obtaining the calibration sequence signal output by the current intermediate frequency link, the current intermediate frequency link is turned on and other intermediate frequency links are turned off, wherein the current intermediate frequency link and the other intermediate frequency links together constitute the multiple intermediate frequency links.
14. The device according to claim 8, wherein The number of the target links is multiple, and further includes: The opening unit is used to open the current target link and close other target links before obtaining the calibration signal to be tested, wherein the current target link is the target link to be calibrated currently, and the current target link and the other target links together constitute a plurality of target links.
15. A link calibration device, characterized in that: Applicable to millimeter wave active antenna unit AAU, including memory, transceiver, processor: memory, used for storing computer programs; a transceiver, configured to transmit and receive data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band; Performing calibration processing on the intermediate frequency link to obtain an intermediate frequency reference signal; Acquire a calibration signal to be tested, wherein the calibration signal to be tested is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band; Acquire a local oscillator signal provided by the millimeter wave active antenna unit AAU; Performing down-conversion processing on the calibration test signal and the local oscillator signal to obtain a target test signal; Determining a signal parameter value corresponding to the target signal to be measured according to the intermediate frequency reference signal; A calibration compensation value corresponding to the calibration signal to be measured is determined according to the signal parameter value, wherein the calibration compensation value is used to calibrate the target link.
16. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is configured to cause the processor to execute the method according to any one of claims 1 to 7.
Citation Information
Patent Citations
Device, system and method for calibration of radar target simulators
EP3812790A1